Apparatus for mixing gases.



No. 709,498. Patented Sflnt. 23, 19112.

-A'. MOLET.

APPARATUS FOR msxme GASES.

(Application filed ocg. ts, 1900. (No Model.) 2 Sheets-Sheet TNE NormsPains. cc, FNQTO-LITHO, WASHKNGTON. o. c.

A. MOLIET.

v Patented Sept. 23, I902.

APPARATUS FOR MIXING GASES (N0 Modul (Application filed Oct. 5, 1900.)

2 Sheets-Sheet 2 THE NORR 1s PETEFIS cu. mom-mum WASHINGTON. u. c.

ALFRED MOLET, OF BUENOS AYRES, ARGENTINA.

APPARATUS FOR MIXING GASES.

SPECIFICATION forming part of Letters Patent No. 709,498, datedSeptember 23, 1902. d/Application filed October 5, 1900. Serial No.32,151. (No model) To all whom it may conccrm.

Be it known that I, ALFRED MOLET, acitizen of. the Republic of France,residing at Buenos Ayres, Argentina, have invented certain new anduseful Improvements in or Relating to Apparatus for Mixing Gases, (forwhich I have made application for Letters Patent in Great Britain underNo. 13,404, dated the 25th day of July, 1900,) of which the following isa specification.

It is often necessary to mix gases in certain previously-determinedproportions.

The apparatus forming the subject of the present application is soconstructed that a mixture absolutely proportional is producedautomatically and strictly in proportion to the quantity used orconsumed by the simple pressure of one or several of the components ofthe mixture.

The apparatus may be applied in all cases Where a mixture of gases isrequired, whatever may be the proportional quantities of the componentgases, the apparatus differing only in details of construction and inthe material employed according to the nature, pressure, and the volumeof the component gases of the mixture.

I will now describe, as an example, an apparatus constructed accordingto this invention for mixing acetylene with air, the latter being drawndirectly from the atmosphere. I make use of the pressure of the gas forthe purpose of obtaining a continuous force and to apply this force soas to obtain the suction necessary for obtaining the required amountofair, the mixing of the latter with the acetylene being efiected directlyand at the pressure required. The necessary constituents of theapparatus, therefore, are a motor device coupled with an air-suctiondevice.

The apparatus in question is represented in the accompanying drawings,in which- Figure l is a vertical section of a side elevation; Fig. 2, avertical section of a front elevation on line A B, Fig. 1; Fig. 3, avertical section of a side elevation on line C D, Fig. 1; and Fig. 1, avertical section of a side elevation of another form of construction ofthe apparatus, as represented by Figs. 1, 2, and 3.

The motor device 5 consists of a drum formed by two sides 6 and 7 and acircumferential chamber divided into cells 8 8, each of which cells isprolonged at each end by a tubular passage, one of which, 9,communicates with the outside, while the other, 10, communicates with acentral chamber 11 of the drum. The tubularprolongations of the cellsoverlap the respective adjacent chamher, as shown. One side, 7, of thedrum is provided with a central opening, while the other side, 6, isfixed on a revolving shaft 12, turning in bearings 13 and 14:. Thesuction device 15 is also provided with a circumferential chamberdivided into cells 16, each 'of which is provided at each end with atubular continuation, as in the case of the motor device, but in areversed direction. One of these, 17, communicates with the outside,while the other, 18, communicates with the central chamber 19, closed inat the sides by two walls, one wall, 20, open at the center, the otheropening one of the walls of the motor-drum already described. Thetubular prolongations of the cells 16, as in the motor devices, overlapthe respective adjacent chambers. This suction device 15 is alsoconnected with the motor-drum 5 by a circular casing 21, so connectingthe two devices that a narrow space 22 is left between the twocircumferential chambers. The casing 21 does not pass over the tubularprolongations 17 of the suction device 15, but completely surrounds thewhole circumference of the motor device 5 with its tubular projections9, so that these latter discharge into the central chamber of thesuction device.

The parts described-namely, the motordrum 5 and the suction device15-are in- :closed in a cylinder 23, supported on a pedestal 24c andprovided at the upper part with an orifice 25.

and the tube 29, through which the mixture of the gas passes from theapparatus, with the cock 30. These act as purging-cocks.

In order to facilitate the understanding of the description, one of thecells 8 has been slightly shaded in Fig. 2, together with itsprolongations 9 and 10 in Fig. 3, one of the cells 16 with itsprolongations l7 and 18, and in Fig. 1 the sections corresponding tothese are shaded. The cells and their tubular projections are socalculated as regards their positions that at no time during the workingof the apparatus can more than one of the tubular projections be abovethe liquid.

The apparatus works as follows: The apparatus having been filled withwater through the orifice 25 acetylene gas is admitted through the tube26. In consequence of the pressure of the gas the level of the Water inthe part of the apparatus affected by such pressure will be lowered andwill rise correspondingly in the part which is under the effect ofatmospheric pressure. While the exit-tube 29 remains closed, thepressure on the surface of the water remains in an equilibrium and thewhole system remains at rest. When, however, the exit-tube 29 isopened,the prolongations of the motor-cell which happen to be above thewater open communication between the casing 21 and the central chamber19 of the suctiondrum. The air contained in the apparatus passes throughthe same and the pressure on the surface in the cells of which thetubular prolongations 10 are rising above the surface of the waterdiminishes, with the result that a rotary movement is set up in thedirection indicated by the arrow 32. This rotary movement has the effectof alternately filling the cells 8 with gas and emptying them into thecylindrical envelop 21, through which it reaches the inner chamber 19 ofthe suction apparatus. In this movement of the motordrum 5 the suctiondevice 15 participates, the cells of which discharge their water andbecome filled with air as the tubular prolongatious l7 emerge from thewater, while, on the contrary, they' become filled with water anddischarge the air which they have just taken in into the inner chamber19 as the tubular continuations emerge from the water. In consequence ofthis action a mixture of air and acetylene gas is effected in the saidchamber 19, in which the two component parts are contained in exactproportions, depending on the relative capacity of the circumferentialcells of the motor and suction devices.

The speed of rotation is self-regulating, according to the more or lessrapid flow of the mixture through the tube 29, and it is evident thatthe production of the mixture, depending as it does on the speed ofrotation, will be in strict accordance with the amount consumed. It isalso clear from the arrangement of the cells that the production of themixture will go on steadily without break as regards continuity duringthe whole time of the working of the apparatus.

The pressure of the mixture will be equal to the difference between theoriginal pressure of the gas and the loss of pressure corresponding tothe work done by the suction device less the loss resulting fromfriction. The level 33 of the water in the chamber 19 will thereforeindicate that pressure.

By simply combining this apparatus with a device indicating the numberof revolutions of the motor-drum it will act as a gasmeter, indicatingthe amount of gas used.

Of course it should be understood that the water may be replaced by anyother solution or other liquid, according to the nature of the gases tobe mixed.

As it is possible that the gases thus brought together may not be fullymixed before leaving the apparatus, it may be necessary instead ofinclosing the motor device 5 in a casing 21, rotating with the latter,to inclose its upper part in a bell 34:, provided with an orifice 35,Fig. 4, the suction device being in this case provided with a side 36,fixed on the shaft 30, instead of one of its sides being formed by themotor-drum. This construction is shown in Fig. 4:.

In the case of mixing acetylene with air the gas would be introduced atthe orifice 35 and air by the tube 25.

What I claim as my invention, and desire to secure by Letters Patent,is-- 1. A gas-mixing apparatus comprising a casing with air and gasinlets and an outlet for the mixed air and gas, and a plurality of drumsmounted upon a common shaft, each of said drums having a series ofadjacent peripheral chambers with inner and outer walls concentric tothe central shaft with outer and inner tubular extensions overlappingthe respective adjacent chambers, substantially as set forth.

2. In a gas-mixing apparatus of the kind described the combination witha casing having air and gas inlets and an outlet for the mixed air andgas, of a drum with a series of adjacent peripheral chambers forming acellular periphery, each chamber having a contracted tubular outer andinner portion overlapping the respective adjacent chambers,substantially as set forth.

3. In a gas-mixing apparatus of the kind described the combination witha casing having air and gas inlets and an outlet for the mixed air andgas, of a plurality of drums mounted upon a common shaft, each providedwith a series of adjacent peripheral chambers forming separate cellswith contracted tubular outer and inner extensions overlapping therespective adjacent chambers, the outer and inner tubular extensions ofone drum extending in the opposite direction to those of the other drum,substantially as set forth.

4. A gas-mixing apparatus of the kind deeral casing connecting one drumto the other,

scribed comprising a casing: with air and ,qas inlets, and an outlet forthe mixed air and gas, a plurality of rotatory drums mounted upon acommon shaft, each drum having a series of peripheral chambers withinner and outer walls concentric to the central shaft, with outer andinner tubular extensions extending in opposite directions and aperiphsubstantially as and for the purpose described.

5. In a gasunixing apparatus of the kind described, a casing providedwith gas-inlets and an outlet for the mixed air and gas, a 1

plurality of drums mounted upon a common shaft, each drum having aseries of peripheral chambers with outer and inner tubular extensionsextendingiu opposite directions, and

